Automatic door-operating mechanism.



, W. D. BAKER.

AUTOMATIC DOOR OPERATING MECHANISM.

I Arrmouxon rmzn 1111.17, 1911.

Patented June 11,1912.

ATTORNEY INVENTOR N 2SEEBTSSHEET 11 J xa N I u 1 ill-ll WITNESSES Wflz co., WASHINGTON D C W. D. BAKER.

AUTOMATIC DOOR OPERATING MECHANISM.

APPLICATION FILED .TAN.17, 1911.

1,029,255, Patented June 11, 1912 2 SHEETS-SHEET 2.

ATTORNEY Cb LUMBIA PMNOGRAPH cm, WASHINOTOY L D. C.

WILLARD D. BAKER, OF ROGERS, ARKANSAS.

AUTOMATIC DOOR-OPERATING MECHANISM.

Application filed January 1'7, 1911.

Specification of Letters Patent.

Patented June 11,1912.

Serial No. 603,167.

To all whom it may concern:

Be it known that I, WILLARD D. BAKER, a citizen of the United States, residing at Rogers, in the county of Benton and State of Arkansas, have invented a new and useful Automatic Door Operating Mechanism, of which the following is a specification.

The invention relates to improvements in door operating mechanism.

The object of the present invention is to improve the construction of door operating mechanism, and to provide a simple, efficient and comparatively inexpensive device, designed for use on doors leading from a dining room to a kitchen, butlers pantry, or similar place, and equipped with a depressible platform, adapted to be operated by the weight of a person to open the door, and movable upward automatically to close the door when relieved of the weight of the person operating it.

With these and other objects in view, the

invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings :Figure 1 is a vertical sectional view of the door operating mechanism, constructed in accordance with this invention and shown applied to a double door. Fig. 2 isa vertical sectional view, taken substantially on the line 22 of Fig. 3. Fig. 3 is a plan view, partly in section. Fig. 1 is a vertical sectional view on the line 4l4 of Fig. 1.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

In the drawings in which is illustrated the preferred embodiment of the invention, the door operating mechanism is shown applied to a double door, having two swinging doors 11, arranged in the usual manner and each equipped with a separate operating device. Although the operating mechanism is arranged in duplicate in the accompanying drawings, it will be clear that it is also applicable to a singledoor. Each door 1 is provided at the top with a pivot 2, preferably formed integral with an attachingplate 3 and projecting above the upper edge of the door and fitting in an opening of a bearing plate 4, secured to the frame or casing 5. Any other form of hinge, however, may be employed for connecting the top of the door with its frame or casing 5.

The bottom of the door is equipped with a hinge element constructed of suitable metal and consisting of an approximately L-shaped attaching portion 6 and a depending pivot or pintle 7. The L-shaped or angle portion 6 fits the lower hinge corner of the door 1,

,and is secured to the same by screws, as clearly illustrated in Fig. 1 of the drawings.

(The depending pivot or pintle 7, which is stepped at its lower end in a bearing 8 of a bracket 9, carries a horizontal spur pinion 10, suitably fixed to the pintle and meshing with a horizontal spur gear 11. The spur gear is connected at its lower side with a spur pinion 12, preferably formed integral with the gear wheel and meshing with a segmental gear 13. The horizontal gear wheel ll-is fixed to a shaft 14, fitted at its upper end in an opening of a bearing plate 15 and stepped at its lower end in a bearing 16 of the bracket 9, but the horizontal gear wheel 11 may be mounted in any other de sired manner, as will be readily understood.

The segmental gear 13, which is provided at one side with an arcuate series of teeth 17 is preferably semi-circular and consists of a semi-circular bar 18, forming the top and sides of the gearand connected at the bottom by a straight bar 19, formed integral with the semi-circular bar 18 and provided with a central bearing 20, which receives the pivot 21 upon which the segmental gear is mounted. The pivot 21 is horizontal and the segmental gear is adapted to oscillate in a vertical plane, motion being communicated therefrom to the pintle of the door by the train of gears 1O, 11 and 12.

The segmental gear is connected at one side with one arm of a lever 22, fulcrumed sition. The lower end of the lever 22 is provided with a Longitudinal slot 24, through which passes a pivot 25 for connecting the lever with the segmental gear 18. The up per end of the lever 22 is connected by a' short link 26 with a depressible platform 27.

The link, which is arranged in an upright position, is pivoted at its upper end to the:

frame-work of the platform, and its lower portion is preferably bifurcated to straddle 1 the lever 22 and is pivoted to the same, but

any other loose connection may be employed for connecting the lever with the platform to permit the necessary play of the parts.

-T he pivot 23 is carried by a bracket 28, and

is suitably secured to a lower framework 29, which also supports the pivot 21.

The platform, which may be of any desired construction, is rectangular and it is located beneath the door and is yieldably supported in an elevated position by coiled springs 30, arranged at suitable points, pref,- erably beneath the corners of the platform and mounted upon the lower frame-work 29. The platform is provided at its corners adj acent to the supporting springs with horizontally projecting lugs 31, preferably consisting of plates or bars secured to the frame-work of the platform and projecting therefrom, as clearly illustrated in Figs. 2 and 3 of the drawings. The projecting lugs operate in fixed vertical guides 32, preferably inverted U-shaped and adapted when one end of the platform is depressed to prevent the other end from rising above the plane of the floor 33, whereby the proper pressure is applied to the lever 22 for imparting motion to the gearing for actuating the door in its swinging movement. The

U-shaped guides are suitably secured to the supporting frame-work, which is provided with recesses 34 to receive the projecting portions of the lugs. The guides and the lugs permit the necessary play, and the gearing is such that only a relatively small amount of movement of the depressible platcombination of a door, a .depressible platform is necessary to open the door. The platform extends a suitable distance beyond the opposite sides of the door to enable it to be readily operated, and the weight of the person upon the platform will open the door and maintain the same in its open position until the platform is relieved of the weight of the person operating it. The springs then automatically close the door and maintain the same in its closed position.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is V 1. I11 adevice of the class described, the

form, means to yieldably support the platform at its normal level, stops to lilnit the upward movement of the platform to said normal level, an oscillatory gear, an operative connection between the oscillatory gear and the door, a lever operatively connecting the depressible platform with the oscillatory gear.

2. In a device of the class described, the combination of a swinging door having a depending vertical pintle extending through the floor, a bearing bracket located beneath the floor and supporting the pintle, a vertical shaft arranged in parallelism wit-h the pintle and also mounted upon the bearing bracket, a pivotally mounted gear arranged to oscillate in a vertical plane, a pinion mounted on the said shaft and meshing with the oscillatory gear, a horizontal gear also mounted on the vertical shaft and connected with the said pinion, a pinion mounted on the said pintle and meshing with the horizontal gear, a depressible platform, springs arranged beneath thedepressible plat-fornr for yieldably supporting the same, and an approximately horizontal lever fu lerumed at a point intermediate of its ends and connected at one end to the platform and at the other end :to the oscillatory gear at one side of the pivot of the same.

3. In a device of the class described, the combination of a swinging door, a depressible platform, springs arranged beneath the platform for yieldably supporting the same, means for limiting the vertical movement of the platform to prevent the same from rising above the plane of the floor, a pivotally mounted gear arranged to oscillate in a vertical plane, an approximately horizontal lever fulcrumed at a point between its ends and connected at one end to the platform and at the other end to the oscillatory gear at one side of the pivot thereof, and gearing for connecting the oscillatory gear with the swinging door. I

4. In a device of the class described, the combination with a swinging door. and'a depressible platform, mechanism for transmitting motion from the platform to the door, springs yi'eldably supporting the platform, lugs projecting'from the platform at the edges thereof, and vertical guides receiving the lugs and permit-ting a limited vertical movement and adapted when pressure is applied to one end of the platform to prevent the other end from rising above the plane of the floor.

5. 'In a device of the class described, the

combination with, a door provided with a hinge element consisting of an approximately L-shaped portion secured to the door at the corners thereof, and a depending pintle extending through-the floor, a bracket supporting the pintle, a horizontal gear mounted on the pintle, a pivotally mounted oscillatory gear arranged to move in a In testimony, that I claim the foregoing vertical plane, gears connecting the horias my own, I have hereto afiixed my signazontal gear with the oscillatory gear, and ture in the presence of two Witnesses.

a lever fulcrumed at an intermediate polnt WILLARD D. BAKER. and connected at one end With the platform Witnesses:

and at its other end with the oscillatory J. I. LOVELACE,

gear at one side of the pivot thereof. H. G. MCFARLIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

